3√5 - 2√7 + √45 - √28
since 45=9*5 and 28=4*7, that is
= 3√5 - 2√7 + 3√5 - 2√7
= 6√5 - 4√7
Simplify 3 square root of 5 end root minus 2 square root of 7 end root plus square root of 45 end root minus square root of 28.
A.2 square root of 12
B.2 square root of 2
C.6 square root of 5 - 4 square root of7
D.6 square root of 10 - 4 square root of 14
1 answer
1 answer